LL Cool J said he won’t cross the picket line. The rapper said Thursday on Instagram that he won’t perform at Philadelphia’s Fourth of July celebration concert while AFSCME District Council 33, the city’s largest blue-collar workers union, is on strike.

LL Cool J and Jazmine Sullivan have both announced they will not be performing at the Wawa Welcome America Fourth of July Concert on the Benjamin Franklin Parkway on Friday due to the ongoing strike.

LL Cool J is pulling out of a Fourth of July concert in Philadelphia in solidarity with city workers unionized with District Council 33, who went on strike on Tuesday after the AFSCME union failed to reach a deal with the city.